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This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
Unit of Measure

Specifications

Series

 N/A 138000

Cup Part Number

 N/A 138172

Design Units

 N/A Imperial

Dimensions

D - Cup Outer Diameter

 N/A 17.2450 in438.023 mm

C - Cup Width

 N/A 1.875 in47.625 mm

Abutment and Fillet Dimensions

r - Cup Backface "To Clear" Radius1 N/A 0.130 in3.30 mm

Db - Cup Backface Backing Diameter

 N/A 16.22 in412.00 mm

Factors

K - Factor2 N/A 1.27
e - ISO Factor3 N/A 0.46
Y - ISO Factor4 N/A 1.31

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1970

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 290
  • 1 These maximum fillet radii will be cleared by the bearing corners.
  • 2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.